/*
 * Copyright (c) 1995, 2008, Oracle and/or its affiliates. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Oracle or the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package br.com.teste;

/*
 * DocumentEventDemo.java requires no other files.
 */

import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
import javax.swing.text.Document;

public class DocumentEventDemo extends JPanel implements ActionListener {
	class MyDocumentListener implements DocumentListener {
		final String newline = "\n";

		public void changedUpdate(DocumentEvent e) {
			// Plain text components don't fire these events.
		}

		public void insertUpdate(DocumentEvent e) {
			this.updateLog(e, "inserted into");
		}

		public void removeUpdate(DocumentEvent e) {
			this.updateLog(e, "removed from");
		}

		public void updateLog(DocumentEvent e, String action) {
			Document doc = e.getDocument();
			int changeLength = e.getLength();
			DocumentEventDemo.this.displayArea.append(changeLength + " character" + ((changeLength == 1) ? " " : "s ")
					+ action + " " + doc.getProperty("name") + "." + this.newline + "  Text length = "
					+ doc.getLength() + this.newline);
			DocumentEventDemo.this.displayArea.setCaretPosition(DocumentEventDemo.this.displayArea.getDocument()
					.getLength());
		}
	}

	class MyTextActionListener implements ActionListener {
		/** Handle the text field Return. */
		public void actionPerformed(ActionEvent e) {
			int selStart = DocumentEventDemo.this.textArea.getSelectionStart();
			int selEnd = DocumentEventDemo.this.textArea.getSelectionEnd();

			DocumentEventDemo.this.textArea.replaceRange(DocumentEventDemo.this.textField.getText(), selStart, selEnd);
			DocumentEventDemo.this.textField.selectAll();
		}
	}

	JTextField textField;

	JTextArea textArea;

	JTextArea displayArea;

	public DocumentEventDemo() {
		super(new GridBagLayout());
		GridBagLayout gridbag = (GridBagLayout) this.getLayout();
		GridBagConstraints c = new GridBagConstraints();

		JButton button = new JButton("Clear");
		button.addActionListener(this);

		this.textField = new JTextField(20);
		this.textField.addActionListener(new MyTextActionListener());
		this.textField.getDocument().addDocumentListener(new MyDocumentListener());
		this.textField.getDocument().putProperty("name", "Text Field");

		this.textArea = new JTextArea();
		this.textArea.getDocument().addDocumentListener(new MyDocumentListener());
		this.textArea.getDocument().putProperty("name", "Text Area");

		JScrollPane scrollPane = new JScrollPane(this.textArea);
		scrollPane.setPreferredSize(new Dimension(200, 75));

		this.displayArea = new JTextArea();
		this.displayArea.setEditable(false);
		JScrollPane displayScrollPane = new JScrollPane(this.displayArea);
		displayScrollPane.setPreferredSize(new Dimension(200, 75));

		c.gridx = 0;
		c.gridy = 0;
		c.weightx = 1.0;
		c.fill = GridBagConstraints.HORIZONTAL;
		gridbag.setConstraints(this.textField, c);
		this.add(this.textField);

		c.gridx = 0;
		c.gridy = 1;
		c.weightx = 0.0;
		c.gridheight = 2;
		c.fill = GridBagConstraints.BOTH;
		gridbag.setConstraints(scrollPane, c);
		this.add(scrollPane);

		c.gridx = 1;
		c.gridy = 0;
		c.weightx = 1.0;
		c.weighty = 1.0;
		gridbag.setConstraints(displayScrollPane, c);
		this.add(displayScrollPane);

		c.gridx = 1;
		c.gridy = 2;
		c.weightx = 0.0;
		c.gridheight = 1;
		c.weighty = 0.0;
		c.fill = GridBagConstraints.HORIZONTAL;
		gridbag.setConstraints(button, c);
		this.add(button);

		this.setPreferredSize(new Dimension(450, 250));
		this.setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));
	}

	/** Handle button click. */
	public void actionPerformed(ActionEvent e) {
		this.displayArea.setText("");
		this.textField.requestFocus();
	}

	/**
	 * Create the GUI and show it. For thread safety, this method should be
	 * invoked from the event-dispatching thread.
	 */
	private static void createAndShowGUI() {
		// Create and set up the window.
		JFrame frame = new JFrame("DocumentEventDemo");
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		// Create and set up the content pane.
		JComponent newContentPane = new DocumentEventDemo();
		newContentPane.setOpaque(false); // content panes must be opaque
		frame.setContentPane(newContentPane);

		// Display the window.
		frame.pack();
		frame.setVisible(true);
	}

	public static void main(String[] args) {
		// Schedule a job for the event-dispatching thread:
		// creating and showing this application's GUI.
		javax.swing.SwingUtilities.invokeLater(new Runnable() {
			public void run() {
				DocumentEventDemo.createAndShowGUI();
			}
		});
	}
}